Disorders of Fatty Acid Oxidation

Effective October 1, 2004, code 277.85, Disorders of fatty acid oxidation, has been created to uniquely identify fatty acid oxidation disorders. Fatty acid oxidation disorders (FODs) are genetic metabolic deficiencies in which the body is unable to break down fatty acids to make energy. Usually glucose is metabolized to provide energy to the body; however, when glucose is not available, the body uses fat. When an enzyme is missing or not working properly, fat cannot be used. More than 20 disorders have been classified as FODs: Carnitine Palmitoyl Transferase I & II Deficiency (CPT I & II) Glutaric...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article covers the introduction of a diagnosis code for fatty acid oxidation disorders and provides a broad overview of the condition group, including commonly recognized subtypes, typical diagnostic testing, and general clinical presentation. It is intended for coding professionals and others who need to understand the scope of the topic and why the code change matters. The article also notes a related exclusion category and the date the new code became effective.

Why This Topic Matters

Fatty acid oxidation disorders are a distinct group of inherited metabolic conditions that may require specific diagnosis coding and careful classification. Understanding the scope of the code creation and the associated disorder group helps support accurate code assignment and record interpretation.

What You Will Learn

  • How the article frames fatty acid oxidation disorders as a diagnosis topic
  • Which broad disorder subtypes are associated with the new code
  • What general diagnostic and clinical context is discussed
  • Which related exclusion is noted in the article

Who Should Read This

  • Medical coders
  • Coding auditors
  • Clinical documentation specialists
  • Revenue cycle staff
  • Healthcare informatics users

Codes Discussed

  • ICD-9-CM: 277.85
  • ICD-9-CM: 277.81

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